Gas tap or cock.



F. ANDREWS. GASjTAP 0R 000K;

APPLIOA'IION FILED FEB 16 1903 in 10mm.

ma mums PEIERS c0. ma'raumol, WASHINGTON, n c.

rlo. 73 53.

UNITED STA E Patented J'une. 9, i903.

PATENT OFFICE.

FREDERICK AUGUSTUS ANDREWS, OF LONDON, ENGLAND.

- GAS TAP OR COCK.

SPECIFICATION forming part of Letters Patent No. 730,332, dated June 9,1903. Application filed February 16, 1903- Serial No. 143,672- (Nomodel.)

To all whmn it may concern.-

Be it known that I, FREDERICK AUGUSTUS ANDREWS, a subject of the King ofGreat Britain, residing at 82 New Bond street, London, England, haveinvented new'and useful Improvements in Gas Taps or Cocks, of which thefollowing is a specification.

My invention relates to gas taps or cocks.

Gas taps or cocks which are subjected to extreme heat-as, for instance,gas-cocks used in connection with inverted burners with incandescentmantles, such as described in the specification of Letters Patent No.684,40&--are very liable to be injured by such heat and to becomejammed.

The object of my invention is to provide a cock which will operate withequal efliciencyi whether hot or cold, and to this end my in-.

vention comprises the improvements hereinafter described.

According to my invention I provide a cook the plug of which is in theform of a frustum of a cone, as heretofore, but the angle or slope ofwhich is such that when the cone is in its seat in the shell anyexpansion of the said cone will tend to force the cone out of the casingin a longitudinal direction instead of causing it to bind therein, as isthe case with ordinary cocks. For convenience of reference I term saidconical portion of the plug a quick-tapering conical portion todistinguish it from the very gradual taper of plugs in ordinary use. Inpractice it is advisable that the conicity of the plug should be suchthat the diameter of the base of the cone of which the plug is a frustumis at least equal to the height of such cone.

My invention will be readily understood by reference to the accompanyingdrawing, which shows a cock in sectional elevation.

a is the shell or body of the cock, which, as shown, is of sphericalshape and provided with a nozzle 1) and socket c f or the attachment tothe gas pipe or fitting.

d is the quick-tapering conical plug, which in the arrangement shown inthe drawing would have in longitudinal central Section the form of anequilateral triangle and which is fitted into a corresponding recess e:in the shell a. V

f is a cap which forms part of the shell and which is screwed into acorresponding aper- "any contraction.

ture in the said shell, a spring 9 being arranged between the inside ofthe shell and the base of the plug.

72. is a lever for operating the plug, andt' is the passage formedthrough the same and through the shell in the usual manner.

With this arrangement it will be understood that the expansion of theplug d will not cause the latter to bind in its seat, as the said plugwill tend under expansion to move in a longitudinal direction, thespring g yielding under such expansion of the said plug and holding thesaid plug in its seat during The handle or lever in may be made ofnon-conducting material or may be insulated from the other parts of thecock and a by-pass for a pilot-light may also be provided for in theordinary manner.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is 1. In a cock, the combination with the shell or casing,provided with a delivery-passage therethrough and a conical seatinterrupting said passage, of a rotatable plug, having a quick-taperingconical portion engaging said seat, and a passage therethrough adaptedto register with the passage through said shell or casing, a stemrigidly connected to said plug and extending outside of the casing forturning said plug, and a spring engaging said plug and pressing saidconical portion thereof against said seat, whereby the expansion of saidplug will cause it to move longitudinally against the pressure of thespring and the binding of the plug in its seat will be avoided,substantially as described.

2. In a cock, the combination with the shell or casing, provided with adelivery-passage therethrough, and a conical seat interrupting saidpassage, of a rotatable plug in said cas-- ing having a quick-taperingconicalportion,

the base of said plug being at least substantially equal to the heightof said conical portion, and being provided with a transverse passageadaptedto register with the passage in the shell or casing, and a springengaging said plug and pressing it against said seat, whereby theexpansion of said plug will cause it to move longitudinally against thepressure of said spring, substantially as described.

3. In a cook, the combination with the shell or casing having a passagetherethrough and a tapering seat interrupting said passage, of arotatable plugin said casing having a quicktapering conical portionengaging said seat and having a transverse passage therethrough' adaptedto register with the passage through the shell or casing, said plughaving a stem rigidly connected thereto and extending through the casingat one side thereof, the opposite side of the casing being provided withan aperture large enough to admit the

